The power relay assembly (PRA) is a component that discharges or recharges a high-voltage battery by supplying or blocking power. Mounted within the High-Voltage Battery System Assembly (BSA), it electrically connects the battery and inverter. The parts applied to the PRA include main relay, precharge relay, resistance, current sensor, temperature sensor, and bus bar. The PRA diagnoses battery performance by monitoring the current and temperature. Created by the in-house development activities that started 2021, the PRA will be installed in Hyundai-Kia Motors' EV, HEV, and FCEV vehicles. We are striving to make price-competitive PRA products through our proprietary technology development capabilities.
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